Philips Semiconductors
74HC244; 74HCT244
Octal buffer/line driver; 3-state
6. Pinning information
6.1 Pinning
74HC244
74HCT244
1OE
2
3
4
5
6
7
8
9
GND 10
2A3 11
GND
(1)
1
terminal 1
index area
20 V
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
74HC244
74HCT244
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
1
2
3
4
5
6
7
8
9
20 V
CC
19 2OE
18 1Y0
17 2A0
16 1Y1
15 2A1
14 1Y2
13 2A2
12 1Y3
11 2A3
001aae011
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND 10
001aae012
Transparent top view
(1) The die substrate is attached to this
pad using conductive die attach
material. It can not be used as supply
pin or input
Fig 4. Pin configuration DIP20, SO20,
SSOP20 and TSSOP20
Fig 5. Pin configuration DHVQFN20
6.2 Pin description
Table 3:
Symbol
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND
2A3
1Y3
2A2
1Y2
74HC_HCT244_3
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
1 output enable input (active LOW)
1 data input 0
2 bus output 0
1 data input 1
2 bus output 1
1 data input 2
2 bus output 2
1 data input 3
2 bus output 3
ground (0 V)
2 data input 3
1 bus output 3
2 data input 2
1 bus output 2
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 22 December 2005
4 of 22
PHILIPS [ NXP SEMICONDUCTORS ]
